Uccle Threshold Days by Year (BE000006447)

12 fixed thresholds counted per year at Uccle (BE000006447): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Uccle Thresholds

Uccle: nights with a minimum temperature at or below 0 C (32 F) in 169 years, most in 1879 with 105.
Uccle: days with a maximum temperature at or below 0 C (32 F) in 156 years, most in 1879 with 44.
Uccle: days with a maximum temperature at or above 30 C (86 F) in 137 years, most in 1947 with 28.
Uccle: days with 10 mm (0.39 in) or more of precipitation in 132 years, most in 1974 with 33.
12 fixed thresholds have at least one qualifying day at Uccle.

Days at or above 30 C (86 F)

137 years with a qualifying day

Days per year at Uccle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 28 in 1947.

Days at or above 30 C (86 F) per year at Uccle
Year	Days	Decade average
1834	4	2.7
1838	2	2.7
1839	2	2.7
1842	11	4.3
1843	1	4.3
1844	1	4.3
1845	4	4.3
1846	10	4.3
1847	4	4.3
1848	1	4.3
1849	2	4.3
1850	2	4.6
1852	11	4.6
1853	1	4.6
1854	1	4.6
1857	3	4.6
1858	9	4.6
1859	5	4.6
1865	2	2
1868	2	2
1870	1	1.7
1872	4	1.7
1873	2	1.7
1874	1	1.7
1875	1	1.7
1876	1	1.7
1879	2	1.7
1880	1	3.3
1881	5	3.3
1882	1	3.3
1883	2	3.3
1884	7	3.3
1885	2	3.3
1886	3	3.3
1887	5	3.3
1890	1	4
1892	5	4
1893	7	4
1894	2	4
1895	2	4
1896	2	4
1897	2	4
1898	8	4
1899	7	4
1900	10	4.9
1901	4	4.9
1903	3	4.9
1904	10	4.9
1905	2	4.9
1906	7	4.9
1908	2	4.9
1909	1	4.9
1911	24	6.8
1912	8	6.8
1913	1	6.8
1914	3	6.8
1915	3	6.8
1917	4	6.8
1918	4	6.8
1919	7	6.8
1921	17	6.2
1922	3	6.2
1923	8	6.2
1924	2	6.2
1925	3	6.2
1926	3	6.2
1927	1	6.2
1928	8	6.2
1929	11	6.2
1930	6	5.9
1931	1	5.9
1932	8	5.9
1933	4	5.9
1934	5	5.9
1935	12	5.9
1936	4	5.9
1937	8	5.9
1938	8	5.9
1939	3	5.9
1940	1	9.4
1941	10	9.4
1942	8	9.4
1943	9	9.4
1944	7	9.4
1945	9	9.4
1946	6	9.4
1947	28	9.4
1948	6	9.4
1949	10	9.4
1950	9	4.9
1951	1	4.9
1952	6	4.9
1953	2	4.9
1954	4	4.9
1955	3	4.9
1956	2	4.9
1957	9	4.9
1958	3	4.9
1959	10	4.9
1960	1	3.8
1961	6	3.8
1962	1	3.8
1963	1	3.8
1964	11	3.8
1966	5	3.8
1967	4	3.8
1968	2	3.8
1969	3	3.8
1972	1	5.3
1973	2	5.3
1975	8	5.3
1976	19	5.3
1977	1	5.3
1978	1	5.3
1980	1	2.5
1981	1	2.5
1982	2	2.5
1983	6	2.5
1984	3	2.5
1986	2	2.5
1987	2	2.5
1989	3	2.5
1990	8	5.6
1991	2	5.6
1992	2	5.6
1994	12	5.6
1995	13	5.6
1996	1	5.6
1997	4	5.6
1998	6	5.6
1999	2	5.6
2007	2	3
2009	4	3
2014	2	2
2020	12	12.7
2025	10	12.7
2026	16	12.7

For each year, a bar from the first to the last day at Uccle meeting 30 C (86 F).

First to last qualifying date each year at Uccle
Year	First date	Last date
1834	1834-07-11	1834-07-18
1838	1838-07-12	1838-07-13
1839	1839-06-17	1839-06-18
1842	1842-06-11	1842-08-24
1843	1843-07-04	1843-07-04
1844	1844-06-23	1844-06-23
1845	1845-06-11	1845-07-06
1846	1846-06-21	1846-08-06
1847	1847-07-15	1847-08-15
1848	1848-07-07	1848-07-07
1849	1849-06-05	1849-07-08
1850	1850-06-26	1850-08-05
1852	1852-07-04	1852-07-17
1853	1853-07-08	1853-07-08
1854	1854-07-24	1854-07-24
1857	1857-07-15	1857-08-04
1858	1858-06-03	1858-08-18
1859	1859-06-28	1859-07-18
1865	1865-07-15	1865-07-16
1868	1868-07-16	1868-07-22
1870	1870-07-25	1870-07-25
1872	1872-07-23	1872-07-26
1873	1873-07-22	1873-07-23
1874	1874-07-02	1874-07-02
1875	1875-08-17	1875-08-17
1876	1876-08-17	1876-08-17
1879	1879-08-03	1879-08-21
1880	1880-05-26	1880-05-26
1881	1881-07-05	1881-07-19
1882	1882-07-15	1882-07-15
1883	1883-06-30	1883-07-03
1884	1884-07-04	1884-08-12
1885	1885-06-05	1885-08-10
1886	1886-07-21	1886-09-01
1887	1887-07-03	1887-08-07
1890	1890-08-01	1890-08-01
1892	1892-05-27	1892-08-22
1893	1893-06-15	1893-08-18
1894	1894-07-01	1894-07-02
1895	1895-08-22	1895-09-10
1896	1896-07-09	1896-07-21
1897	1897-06-24	1897-08-05
1898	1898-08-13	1898-09-09
1899	1899-07-21	1899-09-06
1900	1900-06-11	1900-07-28
1901	1901-07-11	1901-07-18
1903	1903-05-30	1903-09-02
1904	1904-05-26	1904-08-04
1905	1905-06-30	1905-07-27
1906	1906-07-31	1906-09-04
1908	1908-06-03	1908-06-04
1909	1909-08-16	1909-08-16
1911	1911-07-07	1911-09-12
1912	1912-05-12	1912-07-17
1913	1913-06-17	1913-06-17
1914	1914-06-30	1914-08-10
1915	1915-06-07	1915-07-04
1917	1917-06-15	1917-06-18
1918	1918-05-22	1918-08-22
1919	1919-06-08	1919-09-12
1921	1921-05-25	1921-08-02
1922	1922-05-22	1922-05-24
1923	1923-07-06	1923-08-09
1924	1924-07-12	1924-07-16
1925	1925-07-21	1925-08-09
1926	1926-07-14	1926-09-19
1927	1927-07-05	1927-07-05
1928	1928-07-12	1928-09-09
1929	1929-06-12	1929-09-12
1930	1930-07-01	1930-08-30
1931	1931-06-14	1931-06-14
1932	1932-07-05	1932-08-20
1933	1933-07-21	1933-08-06
1934	1934-06-17	1934-09-08
1935	1935-06-10	1935-08-23
1936	1936-06-18	1936-06-21
1937	1937-05-26	1937-08-07
1938	1938-06-08	1938-08-05
1939	1939-06-06	1939-08-20
1940	1940-09-05	1940-09-05
1941	1941-06-20	1941-07-12
1942	1942-07-05	1942-09-12
1943	1943-05-14	1943-09-13
1944	1944-05-28	1944-08-23
1945	1945-05-12	1945-08-28
1946	1946-07-02	1946-08-05
1947	1947-05-31	1947-09-19
1948	1948-06-13	1948-07-30
1949	1949-07-12	1949-09-05
1950	1950-06-04	1950-08-21
1951	1951-07-31	1951-07-31
1952	1952-06-28	1952-07-06
1953	1953-05-25	1953-08-12
1954	1954-05-27	1954-08-03
1955	1955-07-17	1955-08-23
1956	1956-05-28	1956-07-09
1957	1957-06-16	1957-07-06
1958	1958-08-28	1958-09-05
1959	1959-06-24	1959-09-12
1960	1960-06-23	1960-06-23
1961	1961-06-30	1961-09-19
1962	1962-09-03	1962-09-03
1963	1963-07-22	1963-07-22
1964	1964-06-13	1964-09-14
1966	1966-06-09	1966-08-13
1967	1967-07-12	1967-08-01
1968	1968-07-01	1968-07-02
1969	1969-05-13	1969-07-23
1972	1972-07-19	1972-07-19
1973	1973-07-05	1973-09-05
1975	1975-07-14	1975-08-08
1976	1976-06-09	1976-08-25
1977	1977-06-13	1977-06-13
1978	1978-07-30	1978-07-30
1980	1980-08-02	1980-08-02
1981	1981-08-06	1981-08-06
1982	1982-07-09	1982-07-13
1983	1983-07-10	1983-08-19
1984	1984-07-08	1984-07-30
1986	1986-07-02	1986-08-03
1987	1987-06-30	1987-08-21
1989	1989-07-06	1989-08-20
1990	1990-07-27	1990-08-29
1991	1991-07-11	1991-08-06
1992	1992-05-14	1992-08-08
1994	1994-06-24	1994-08-04
1995	1995-06-30	1995-08-19
1996	1996-06-07	1996-06-07
1997	1997-08-10	1997-08-25
1998	1998-05-11	1998-08-11
1999	1999-08-01	1999-08-02
2007	2007-07-15	2007-08-05
2009	2009-07-02	2009-08-20
2014	2014-07-18	2014-07-19
2020	2020-07-31	2020-09-15
2025	2025-06-12	2025-09-07
2026	2026-05-26	2026-08-14

Every Fixed Threshold

Fixed thresholds at Uccle
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	137	28	1947	16
35 C (95 F): Days	18	5	1911	3
90 F (32.2 C): Days	76	15	1911	9
100 F (37.8 C): Days	1	1	1947	1
0 C (32 F): Ice days (max	156	44	1879	2
0 C (32 F): Frost days (min	169	105	1879	14
-10 C (14 F): Days with min	96	24	1963	3
-20 C (-4 F): Days with min	1	1	1881	1
20 C (68 F): Tropical nights (min	33	4	1995	8
10 mm (0.39 in): Days with 10 mm or more rain	132	33	1974	27
25 mm (0.98 in): Days with 25 mm or more rain	111	5	1933	7
50 mm (1.97 in): Days with 50 mm or more rain	16	2	1996	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1834.

Download the Data

Data for Uccle threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Uccle Threshold Days by Year (BE000006447)

Key Facts for Uccle Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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